常见的蛋白质测定方法是经典的湿化学凯氏定氮法和基于燃烧的杜马斯法。这两种方法实际上都决定了氮，而不是直接蛋白质值。蛋白质值是使用氮到蛋白质转换因子计算的，并假设生物基质中的氮源是蛋白质。氮-蛋白质因子因食品材料而异，本方案比较了两种方法的实验数据和区别。

The LECO TGA801 is a macro thermogravimetric analyzer designed to determine moisture, volatile and ash content of materials by measuring the change in mass of the sample as a function of the oven temperature while controlling the atmosphere and ventilation rate. The TGA801 allows up to 19 samples to be analyzed simultaneously.

利用力可LECO SC832碳硫分析仪分析水泥、土壤、石灰石等样品中的碳硫含量获得良好效果，该仪器采用电阻炉，最高温度1550℃。

铝及铝合金样品密度小，氢含量小，常规称样受限于体积，只能取微量样品，力可的RHEN602可以多至称取6g样品，并可区分表面氢、基体氢和总氢。

力可RC612多相碳水分析仪，可以直接检测有机碳和无机碳含量，水分含量，表面碳水含量等。利用程序升温电阻炉和释放峰型可区分有机碳无机碳

利用GDS850辉光放电光谱仪分析镀锌钢板表面镀层的厚度和重量及每种镀层元素随深度的分布，深度分辨率可达0.1nm

The DH603 allows the analyst to determine the amount of hydrogen present in its molten form and after solidification and cooling by incorporating an optional vacuum pin tube sample piercer for diffusible hydrogen determination and a hot extraction furnace for residual hydrogen determination.

Oxides are abrasive, and cause damage to the pumps and nozzles of high speed/volume solder equipment. Excessive oxide content is also known to cause grainy or dull solder joints, with poor electrical and mechanical properties. LECO 736 series oxygen determinators, which detect oxygen as CO , will quickly and accurately determine 2 the amount of oxygen present in tin and lead-based solder powders.

Alpha-phase titanium alloys are less ductile and have less strength than the beta-phase alloys, but have higher corrosion resistance and deformability. Carbon is considered to be an impurity, commonly introduced during the manufacturing process, of commercially pure (CP) titanium grades.

The determination of the amount of oxygen, nitrogen, and hydrogen in iron, steel, nickel-, and cobalt-base alloys represents some of the most important quality metrics for these materials. The ONH836 utilizes a high-power electrode furnace to quickly and efficiently release the target gases from within the sample, which allows for a very rapid simultaneous determination of oxygen, nitrogen, and hydrogen.

Ferroalloys are alloys of iron that contain a high level of one or more other primary elements. The principle ferroalloys consist of silicon, manganese, and chromium that are used as vehicles to introduce the alloying element into the molten metal when making steel or cast iron. For example, silicon is used to deoxidize steel and as an alloying element in cast iron. Manganese is used as an alloying element and mitigates the harmful effects of sulfur in cast iron and steel. Chromium increases corrosion resistance in stainless steels. Since carbon is the most important alloying constituent in steel and cast iron production, and sulfur is a harmful contaminant that negatively affects the mechanical properties of steel and cast iron, the determination of carbon and sulfur levels in the ferroalloy feed stock is a critical quality control parameter.

Carbon, hydrogen, and nitrogen determination is part of the ultimate analysis of coal fuel material, aiding in characterizing the material and providing information that can be utilized in calculating material/energy balances and efficiencies, as well as emission potentials for the coal fuel. The carbon, hydrogen, and nitrogen results for a coal material are also utilized to evaluate the reactivity potential for its use in a liquefaction or gasification process.

用力可AC600量热仪，苯甲酸为标样分析 The gross calorific value of coal, a solid fossil hydrocarbon fuel material, is most often used when calculating the total calorific value for a quantity of coal for fuel value purposes, or when determining the classification rank of the coal material. The gross calorific value and sulfur value of the coal material can also be used to calculate whether or not the coal material meets regulatory requirements for industrial fuel use.

新型毒品-人工合成大麻，没有商业谱图。常规分析难于检出及鉴定。但在力可的高分辨飞行时间质谱仪下原形毕露，此台高分辨GC-TOf可以协助您快速鉴定未知物。

利用高效液相色谱-高分辨飞行时间质谱，对尿液中Acetaminophen扑热息痛, Dextromethorphan美沙芬, and Doxylamine抗敏安的代谢物进行分析。通过精确质谱、同位素分布、离子碎片信息进行定性定量分析。

GCxGC拥有更高的分离空间，可以有效解决组分共流出问题，获得更加干净的质谱图，提升定性定量可靠性。高分辨TOF则提供了另一个维度的定性指标（碎片离子的精确质量），让我们可以对常规定性结果作确认或修正。